Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on Explosive Hazardous Areas in Hydrogen Handling Facility

수소 취급설비의 폭발위험장소에 관한 연구

  • 표돈영 (한국산업안전보건공단) ;
  • 임옥택 (울산대학교 기계공학과)
  • Received : 2018.11.20
  • Accepted : 2019.02.28
  • Published : 2019.02.28
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Abstract

Safety of hydrogen handling facilities is needed as supply of hydrogen cars has been expanded recently. In this study, the adequacy of safety regulations of hydrogen handling facilities and the risk of damage with hydrogen leakage were studied. The range of explosion hazard location of the hydrogen filling plant was investigated using the computational fluid dynamics (CFD) method, Explosive hazardous area is influenced by leakage type, hole size and sectional area. When the conditions of KS standard are applied, range explosive hazardous area is expanded 7.05 m, maximum. It is about 7 times larger than exceptional standard of hydrogen station. Meanwhile, distance from leakage point to 25% LEL of hydrogen is investigated 1.6 m. Considering the shape of charging hose, regulation of hydrogen station is appropriate.

Keywords

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Fig. 1. Degree of dilution

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Fig. 2. Hazardous distance

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Table 2. Type of zone & hazardous distance for variable forms of release & hole cross section

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Fig. 5. Cloud profile concentration, 10 seconds after the re-lease started. (a) general analysis, (b) local analysis 계 구축사업].

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Fig. 3. Forms of release

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Fig. 4. Hazardous distances for variable forms of release & hole cross section

Table 1. Zones for grade of release and effectiveness of ven-tilation

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References

  1. KS C IEC 60079-10-1: 2015, "Classification of areas - Explosive gas atmospheres", Korea Agency for Technology and Standards, 2017.
  2. KGS GC101 2018, "Classification Code of Explosive Hazardous Area on Gas Facility", Korea Gas Safety Corporation, 2018.
  3. "Exception Regulation on Installation Guideline of Convergence.Integration, Package and Portable Vehicles Refueling", Ministry of Trade, Industry and Energy, 2018.
  4. KOSHA Guide P-92-2012, "Guide on Source Term Modeling", Korea Occupational Safety & Health Agency, 2012.
  5. C. J. Lea and H. S. Ledin, "A Review of the State-of-the-Art in Gas Explosion Modelling", Health and Safety Laboratory, UK, 2002.
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  7. P. Midha, O.R. Hansen, J. Grune, and A. Kotchourko, "CFD calculations of gas leak dispersion and subsequent gas explosions: Validation against ignited impinging hydrogen jet experiments", J. Hazard Mater., Vol. 179, No. 1-3, 2010, pp. 84-94, doi: https://doi.org/10.1016/j.jhazmat.2010.02.061.